Calcium chloride to lower PH


crsublette

coyotes call me Charles
Joined
Oct 23, 2011
Messages
2,678
Reaction score
1,099
Location
Dalhart Texas
Hardiness Zone
6a
Yep, in our pond context, all algae require an inorganic carbon, such as bicarbonate and carbon dioxide, to survive. It would not take much algae for it to change the pH.

Very good. KH is doing its job. From what you are describing, the raised KH from baking soda is equilibrating. Even though it is fast, it is not instant and still takes time to function.

A pH swing between 8.2~8.4 is very good although I bet the Ecofix is causing the pH to be higher than it should be. With a 4 dKH, the pH should actually be more like around 7.5~7.8, that is assuming little phosphates in the water and no other residuals in the water that can affect the pH.

A pH of 8.2~8.4 with a KH of 4 dKH does not make much sense so this is why I think there is much more going on in your pond water that we do not know nor understand. I don't think this is anything to be concerned about, but something to keep in the back of your head muddling around a bit.
 
Ad

Advertisements

Joined
Mar 19, 2013
Messages
138
Reaction score
43
Location
Southern New Jersey
I agree with the much more going on in the pond that's not understood. KH is still at 4 even after 8 oz. of baking soda. GH was 16 for the past 2 days so I'm assuming my test was correct for that. PH was again in the 8.0-8.4 range over the last 48hrs. Algae is still the same, a murky greenish brown. All other levels are normal. Ammonia, nitrites, and phosphate all in the 0 range.

Over the last few weeks I've been tackling a few different issues at a time. Too many variables going on to determine what's causing what and what's working. I'm going to work on the KH to get that up then move on to the algae issue. I'm sure in this heat the fish don't mind the water being murky:).

Thanks for all your help!!
 
Joined
Dec 24, 2020
Messages
36
Reaction score
10
Country
United States
Hi all. I used baking soda to raise my KH but now my PH is at 9.0. When I first did the baking soda my PH went up to the 8.4-8.6 range from 8.0. I've read where calcium chloride will lower the PH to 8.3 if baking soda has been used to raise the KH. My questions are what and where do I get calcium chloride( is it a salt?) and how much to use per 1000 gallons?
Hi I enlarged my pond with a new addition which is a little bit more than 2 months old. I connected my old pond of 2800 gallons with my new pond which is 7800 gallons giving me a total pond of 10,600 gallons. When I first took my PH readings everything was fine until the plants started growing and algae on all the rocks. My PH was 7.5 in the night after 10 PM and went up to 9 in the day after 10 AM. I was going crazy taking readings every couple of hours and through the night. I found out if you let nature do it's job with our putting any PH up or PH down or backing soda it will level off to the correct PH. Of course you have to have a decent filter and air in your pond and if you have all of that it will correct on it's own. It could take anywhere from 60 to 90 days. My pond corrected it's self in a little bit more than 2 months. I checked this afternoon and the PH was 7.5. So give it time as long as you have all your basses covered good air, filtration and plants nature will do it's job and correct the problem. Of course if things are dangerous like PH of 10 or more than you must take action to lower it. Other than that have patience.
 

brokensword

...and not every pond in Michigan has a loon!
Joined
Jun 22, 2011
Messages
4,144
Reaction score
3,247
Location
Michigan
Showcase(s):
1
Hardiness Zone
5b
Country
United States
@Pondfun While excellent information….this thread is quite old. Not sure if the OP is still around.
not to mention that KH is the number you need to fix, if necessary. And, a stable pH is much more important than what it actually is (within reason).
 
Ad

Advertisements

Ad

Advertisements


Ask a Question

Want to reply to this thread or ask your own question?

You'll need to choose a username for the site, which only take a couple of moments. After that, you can post your question and our members will help you out.

Ask a Question

Top